Effects on engineering properties of cement-treated road base with slow setting bitumen emulsion

Baghini, Mojtaba Shojaei; Ismail, Amiruddin; Karim, Mohamed Rehan; Shokri, Foad; Firoozi, Ali Asghar

doi:10.1080/10298436.2015.1065988

Cited by 17 publications

(6 citation statements)

References 28 publications

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“…Despite the fact that good pavement is constructed with existing materials, applications of nanotechnology can improve pavement performance significantly. Scientists anticipate that nanotechnology may offer great potential in the fields of material design, manufacturing, properties, monitoring, and modelling for advances in asphalt pavement technology [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Potential of Using Nanocarbons to Stabilize Weak Soils

Alsharef

Taha

Firoozi

et al. 2016

Applied and Environmental Soil Science

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Soil stabilization, using a variety of stabilizers, is a common method used by engineers and designers to enhance the properties of soil. The use of nanomaterials for soil stabilization is one of the most active research areas that also encompass a number of disciplines, including civil engineering and construction materials. Soils improved by nanomaterials could provide a novel, smart, and eco-and environment-friendly construction material for sustainability. In this case, carbon nanomaterials (CNMs) have become candidates for numerous applications in civil engineering. The main objective of this paper is to explore improvements in the physical properties of UKM residual soil using small amounts (0.05, 0.075, 0.1, and 0.2%) of nanocarbons, that is, carbon nanotube (multiwall carbon nanotube (MWCNTs)) and carbon nanofibers (CNFs). The parameters investigated in this study include Atterberg's limits, optimum water content, maximum dry density, specific gravity, pH, and hydraulic conductivity. Nanocarbons increased the pH values from 3.93 to 4.16. Furthermore, the hydraulic conductivity values of the stabilized fine-grained soil samples containing MWCNTs decreased from 2.16 − 09 m/s to 9.46 − 10 m/s and, in the reinforcement sample by CNFs, the hydraulic conductivity value decreased to 7.44 − 10 m/s. Small amount of nanocarbons (MWCNTs and CNFs) decreased the optimum moisture content, increased maximum dry density, reduced the plasticity index, and also had a significant effect on its hydraulic conductivity.

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Section: Introductionmentioning

confidence: 99%

Potential of Using Nanocarbons to Stabilize Weak Soils

Alsharef

Taha

Firoozi

et al. 2016

Applied and Environmental Soil Science

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“…The primary challenge is the mechanical properties of CRMB. CRMB has a high modulus and good rutting resistance [4][5][6] because cement hydrates can greatly increase the stiffness of bitumen binder [7]. However, because of the high void content and the addition of cement, CRMB features low tensile strength and low ductility [8,9], so that its cracking resistance is weak compared to conventional hot mix asphalt and hot recycling asphalt [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Rejuvenating Agent on the Pavement Properties of Cold Recycled Mixture with Bitmen Emulsion

Ouyang

Cao

et al. 2021

Coatings

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A traditional cold recycled mixture with bitumen emulsion (CRMB) has a relatively low cracking resistance and moisture susceptibility, which greatly limits its application scope. A rejuvenating agent was employed to improve the pavement properties of CRMB. To avoid the rejuvenating agent having an adverse effect on the new bitumen, reclaimed asphalt pavement (RAP) was firstly treated by the rejuvenating agent, and the effect of rejuvenating time on the pavement properties of CRMB was investigated. Results indicate that the addition of a rejuvenating agent can greatly improve the ductility and moisture susceptibility of CRMB. Meanwhile, although the rejuvenating agent can soften aged bitumen, the addition of a rejuvenating agent can still increase the indirect tensile strength of CRMB and does not greatly reduce the rutting resistance of CRMB. This phenomenon exists because the rejuvenating agent can be both beneficial to the membrane structure of the bitumen emulsion mastic and aged bitumen. It can also greatly improve the bonding interface between RAP and the bitumen emulsion mastic. The rejuvenating time between RAP and the rejuvenating agent can affect the pavement properties of CRMB. To obtain better pavement properties, the optimum recommended rejuvenating time is between 5 and 7 days. Overall, the addition of rejuvenating agent can be a good choice to improve the pavement properties of CRMB.

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“…However, the high void content reduces the internal friction resistance of aggregate skeleton, so the mechanical properties are also decreased. Factors influencing the volumetric and mechanical properties of CRME were intensively investigated in the past, such as the gradation types, asphalt emulsion content, the additional water content, the cement content and cement types, and filler types [3,7,8,10,[13][14][15][16][17][18][19][20]. ese studies are all very meaningful to optimally design the mechanical properties of CRME.…”

Section: Introductionmentioning

confidence: 99%

Effect of Superplasticizer and Wetting Agent on Volumetric and Mechanical Properties of Cold Recycled Mixture with Asphalt Emulsion

Yang

Ouyang

Meng

et al. 2020

Advances in Materials Science and Engineering

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Cold recycled mixture with asphalt emulsion (CRME) has gained more appreciation due to its environmental and economical advantages. Surfactant greatly affects the interaction between asphalt emulsion and cement, which can greatly affect the volumetric and mechanical properties of CRME. If the surfactant can greatly improve the volumetric and mechanical properties of CRME, that could be of great attraction. In this study, a polycarboxylate-based superplasticizer and wetting agent (DN500, polymers containing high-pigment groups) were employed to improve the volumetric and mechanical properties of CRME. Results indicate that the addition of superplasticizer and DN500 can reduce the void content of CRME and increase the indirect tensile strength (ITS) and stiffness modulus as well as critical strain energy density (CSED) of CRME. Besides, the failure strain of CRME is also increased by adding superplasticizer and DN500. This phenomenon is probably due to that superplasticizer can decrease the viscosity of cement asphalt emulsion paste (CAEP) and help to form a better asphalt film, and DN500 can moderately decrease the viscosity of CAEP and increase the wetting ability of asphalt emulsion as a wetting agent. CRME with superplasticizer has the best mechanical properties among all CRMEs. Compared to reference CRME, the ITS, stiffness modulus, and CSED of CRME with superplasticizer can increase by 33.7%, 8.0%, and 17.5% at the optimum water content, respectively. It is recommended to improve the volumetric and mechanical properties of CRME by adding superplasticizer.

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Effects on engineering properties of cement-treated road base with slow setting bitumen emulsion

Cited by 17 publications

References 28 publications

Potential of Using Nanocarbons to Stabilize Weak Soils

Potential of Using Nanocarbons to Stabilize Weak Soils

Effect of Rejuvenating Agent on the Pavement Properties of Cold Recycled Mixture with Bitmen Emulsion

Effect of Superplasticizer and Wetting Agent on Volumetric and Mechanical Properties of Cold Recycled Mixture with Asphalt Emulsion

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